Friction drive mechanism for motor-cars.



N 8 i I ATENT n AUG.4 1908.

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FRICTION DRIVE MECHANISM FOR MOTOR CARS,

APPLICATION FILED D3016, 1907.

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I Snood PATENTED AUG 4, 1908.

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. FRICTION DRIVE MECHANISM FOR MOTOR CARS.

'APPLIGATION FILED D3016. 1907.

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UNITED STATES PATENT OFFICE.

CHARLES C. KEYSER, OF WASHINGTON, DISTRICT OF COLUMBIA.

FRICTION: DRIVE MECHANISM FOR Moron-cans.

Application filed'December 16, '1907. Serial No'. 406,710.

Specification of Letters Patent.

Patented Aug. 4, 1908.

To all whom it may concern:

Be it known that I, CHARLES C. KEYSTJR,

a citizen of the United States, residing at Washington, in the District of Columbia,

have invented certain new and useful Improvements 1n Friction Drive Mechanisms for Motor-Cars; andI do hereby declare the following to be a full, clear,and ex'aotdescription ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same. v

The present invention has reference to improvements in friction drive mechanisms for motor cars, and it resides, generally in the rovision of an exceedingly simple,

readi y operated, and efficientmechanism of' that nature comprising a main swinging gear carried by a shaft pivoted to the shaft of the engine, and dis osed in frictional contact with a relative y stationary secondary gear secured to the-counter shaft of the car, whereby any change in the position of the swinging gear'will vary its point of contact with the'stationary gear, and will effect a resultant change in the speed at which the car is driven.

The invention further contemplates the provision. of a brake mechanism connected with both of the above mentiioned gears and i applied thereto simultaneously upon the movement of a single pedal,-to which end the swinging gear is secured to a flanged carriage slidable upon the pivoted shaft and engaged with an arcuate guidepivoted at one end to the body of the'carand connected atits free" end with the pedal the guidebeing also connected at its free end to a shoe-carrying lever, whereby, when the pedal is depressed, the movement of the guide will slide the main gear and its carriage bodily'upon the swinging shaft out of contact with the sec ondary gear, to whoserim the shoe isiapplied simultaneously with the movement of the maingear. I

The-invention still furtherresides in the particular construction of the gear carriage,

and the guide upon which the carriage travels, and in the provision of means foryieldingly pressing the guide towards the secondary gear.

These and other features which form the subject matter of this case will be readily, understood from a consideration of the following detailed description, and'their preferred embodiment is illustrated in the ac companying drawings inwhich similar parts side bars of the supplemental frame.

are designatedby corresponding reference numerals in the several views Of thesaid drawings :Figure 1 is a plan view ofthe mechanism applied to a motor card Fig. 2 is a side elevation thereof, one of the sidebars being broken away for clear ness of illustration. Fig. 3 is an enlarged detail view of the shoe-carrying lever and the secondary gear, the latter being shown in section. Fig. 4 is an enlarged detail section through the casing of the spring-pressed bolt which connects the guide with one of the Fig. '5 is a similar section on the line 55 of Fig. 1

illustrating the pivotal mounting of the guide. Fig. 6 is an enlarged fragmental sec- -tion through the main friction gear, and its carriage, showing also a portion of the guide upon which the carriage travels.

Referring more particularly to the drawings 7 designates generally, the main frame or body of the car, 8 and 9 the front'and rear axles, and 10 the engine, which last-mentioned' element is carried by a su lemental frame 11, the rearends of whose s1 e bars areprovided with alining openin s through which theends of the counter-s aft-12 ex- 1tend. The supplemental frame, however, formsthe subject of and is described in deto the adjacent side bar 0 the supplemental frame, the pivotbolt 19 extending througha a slot 20 formed in the side bar as longitudin shown 'in Fig. 5, thus permitting a certain ad justment of the guide with reference thereto.

This guide which is bowed rearwardly of the by means of a spring-pressed bolt 21 whose headedend is fitted in a casing 22 linked to a plate bolted to the side face of the right hand side bar of the supplemental frame, said bolt extending through a depending flange 23 formed on the lower face of the guide, the guidebeing' held in adjusted position with reference to said bolt by means of pairs of jam ni1ts'24 and beveled washers 25 disframe is yieldingly forced in such direction posed upon opposite sides of the flange 23.

The formation of the flange above referred to renders said guide approximately T-shaped in cross-section, said flange, however, terminating short of the pivoted end of the guide to permit a free movement thereof.

The guide is moved forwardly against the tension of the spring which surrounds the bolt 21 by means of a pedal 26 pivoted to the main frame, the lower end of the pedal being connected by a link 27 With a rod 28 which in turn is pivoted to the guide as shown in Figs.

. 1 and 2, said rod extending forwardly of the guide.

The rear end of the swinging shaft is keyseated as indicated by the numeral 29, and such end has fitted for sliding movement thereon a sleeve 30 and a conveXo-concave friction gear 32, said gear having formed thereon an axial bushing 33 through which said shaft end likewise passes, the front face of the bushing contacting with an annular flange 34 which projects laterally from the sleeve and is formed integral therewith. The sleeve has mounted thereon a carriage 35, which is itself in the nature of a sleeve, being provided with an axial opening through which the sleeve 30 extends, said carriage being held against movement longitudinally thereof by a pair of locknuts 36 fitted upon the threaded forward end of said sleeve, and a pair of steel plates 37 located adjacent the flange 34 and arranged in spaced relation to each other, a pair of race plates 38 being disposed between the plates 37, the race plates supporting anti-fraction bearings 39. The friction gear 32 is connected with the sleeve 30 by a series of bolts 40 which pass through the flange 34 and the bushing of said gear, and with the shaft 17 by a bolt 41, the reduced end of whose shank passes through the bushing and extends into the key-seat 29, as shown in Fig. 6, said bolt thus serving as a key.

Owing to the extension of the bolt 41 into the key-seat the gear 32 will rotate with the said shaft during the revolution thereof, which movement is likewise imparted to the sleeve 30 by reason of its connection to said gear. The carriage 35, which is mounted upon the sleeve, is held against rotation by means of a pair of oppositely-disposed L- shaped flanges 42 formed on the bottom thereof and adapted for engagement with the horizontal arm or body of the guide 18 beneath the lower face of which said flanges extend.

Theswinging movement of the shaft 17 is effected by means of a lever 43 which is likewise pivoted .to the side bar of the main frame adjacent the free end of the guide and is connected by a pair of links 44 and 45 with the carriage 35, said links, owing'to their pivotal connection with each other formmg a toggle,

:as will be understood. By reason of this construction it will be apparent that when said lever is moved in one direction or the other the shaft 17 will be swung towards one side or the other of the machine. The swinging shaft is retained in adjusted position by a. dog and rack mechanism 46, the dog being carried by the operating lever 43.

The friction gear 32 is adapted to engage a. secondary friction gear which is carried by the counter-shaft 12, and comprises a ring 47 of friction material bolted to a flanged plate 48 as shown in Fig. 3, the rim of said ring being slightly concaved to permit a more complete contact thereof with the convex face of the main friction gear.

It will be apparent from the foregoing that when the pedal 26 is depressed, the resultant swinging movement of the guide 18 will effect a sliding movement of the main friction gear and its carriage forwardly of the shaft 17, thus withdrawing said gear from cent a ct with the secondary gear. The invention, however, also contemplates the provision of means for braking the secondary friction gear simultaneously with the disengagement of the main gear therefrom, and to this end the right-hand side bar of the main frame has bolted thereto ahorizontal L-shaped bracket '49 to which a lever 50 is pivoted intermediate its ends, the inner end. of said lever carrying a brake-shoe 51 adapted to be moved into contact with the flange 52 of the plate 48, the other end of said lever being connected by a link 53 with the top portion of the guide 18, said link being disposed in virtual alinemcnt with the link 28 which latter is in turn connected with the pedal.

The speed at which the car is driven can be accurately regulated by changing the position of the swinging gear with reference to the secondary gear, the movement of said swinging gear being effected approximately by that of the shaft 17 whose movement is controlled by the operating lever 43.

The concave formation of the rim of the friction ring permits the same to be properly engaged by the convex face of the main gear as will be understood, the latter and its carriage being forced yieldingly towards said ring by the spring pressed bolt 21.

The above described arrangement of parts permits the speed of the car to be accurately regulated, as already stated, and likewise permits the machine to be at once stopped short when necessary, the brake-shoe being applied to the secondary gear simultaneously with the disengagement of the main gear therefrom.

The upper portionof the carriage forms an oil-cup and is provided with ducts leading to the sleeve 30, by means of which the lubricant is supplied to the latter.

The fixed disposition of the secondary friction gear upon the counter-shaft permits the use of a connecting brace 13, or a series of such braces, beneath said shaft and the rear axle, which braces serve to take up all unnecessary spring and strain upon thewcounslidable upon thecountereshaft.

Whatis claimed is 1* 1. The combination of a drivingshaft an driven shaft; a. carriage. slidable upon. the

driving shaft; a friction gear secured to. said carriage; a friction gearsecured to the drivenshaft and adapted for contact with the-firstmentioned gear; a pivoted-arcuateguide con-.

nected intermediate itsends with said carriage; and means for swinging saidguide bodily in one direction;toyimparta, sliding movement to the carriage-and the gear secured thereto, and withdraw the latter from contact with the last-mentionedigear.

2. The combination of a driving shaft; a pivoted guide; a carriage slidable upon the driving shaft and providedwith flanges adapted for engagement with said guide; a friction gear secured to said carriage; a friction gear secured to the driven shaft and adapted for contact with the first-mentioned ear; and

means for swinging said guide bod' y in one direction to impart a slidingmovement to'the carriage and the gear secured thereto, and withdraw the latter from contact. with the last-mentioned gear.

3. The combination of a pivoted driving shaft; a carriage slidable thereupon; a friction gear secured to said carriage; a'driven shaft; a friction gear secured to the driven shaft and adapted for contact with the firstmentioned gear; a guide engaged with the carriage; means for swinging the pivoted shaft bodily along the guide, to changethe point of contact between said gears; and separate means for moving said guide bodilyaway from the last-mentioned gear, to slide said carriage and its gear bodily along said shaft and withdraw said gear from contact with the last-mentioned gear. 1

4. The combination of a pivoted driving shaft; a carriage slidable thereupon; a friction gear secured to said carriage; a driven shaft; a friction gear secured to the driven shaft and adapted for contact with the firstmentioned gear; a pivoted guide engaged with the carriage; means for swinging the pivoted shaft bodily along the guide, to change the point of contact between the gears; and separate means for swinging said guide bodily away from the last-mentioned gear, to

slide said carriage and itsgear bodily along said shaft and withdraw said gear from contact with the last-mentioned gear. i a

5. The combinationof a pivoted driving shaft; a carriage slidable thereupon; a friction gear secured to said carriage; adriven shaft; a friction gear secured to the driven shaft and adapted forcontact withthe firstmentioned gear; a pivoted guide engaged with the carriage; means for yieldingly fore-L ing, said guide bodily in one direction, to normeans for; swinging said guide bodily 1n the opposite direction, to slide said carriage and I its gear bodily along said shaft and withdraw said gear from contact with the last-mentioned gear.

6. Thercombination of a driving shaft and a driven shaft; a friction gear slidable upon the drivingshaft; a friction gear secured to thedriven-shaftand adapted for contact with theifirstsmentioned gear; a brake disposed adjacent ,the last-mentioned gear; and a member connected with the sliding gear, and with the brake, for simultaneously withdrawing the sliding gear from engagement with the lastmentioned gear, and braking said last-mentioned gear. a i Y 7. The combination of a driving shaft and a driven shaft; a carriage slidable thereupon; a friction gear secured to said carriage; a friction gear secured to the driven shaft and adapted for contact with the first-mentioned gear; a brake disposed adjacent the last-mentioned gear; a pivoted member connected with said carriage and said brake; and means for swinging said member in one direction, to simultaneously, withdraw the sliding gear from engagement with the lastmentioned gear, and brake the last-mentioned gear.

8. The combination of a pivoted driving shaft; a carriage mounted thereon; a friction gear secured thereto; a driven shaft; a friction gearsecured to the driven shaft and adapted for contact with the first-mentioned ear; a lever; and a toggle joint between the ever and carriage for swinging the pivoted shaft bodily, to change the point of contact between the 'gears.

9. The combination of a driving shaft; a sleeve slidably mounted on one end of said shaft and rotatable therewith; a friction gear secured to said sleeve; a pivoted guide disposedbeneath said shaft; a non-rotatable carriage mounted upon said sleeve and provided with de ending flanges adapted for enagement wit said guide; a driven shaft; a

' riction gear secured thereto and adapted for contact with the first-mentioned gear; and means for swinging said guide in one direction, toslide said carriage, sleeve, and gear bodily upon the driving shaft, to withdraw said ear from contact with the last-mentione gear.

10. The combination of a pivoted drivin shaft; a sleeve slidably mounted on one en of said shaft and rotatable therewith; a friction gear secured to said sleeve; a pivoted guide disposed beneath said shaft; a non-rotatable carriage mounted upon said sleeve and provided with depending flanges adapt ed for engagement with said guide; a driven &

shaft; a friction gear secured thereto and adapted for contact with the first-mentioned gear; means for swinging said guide in one direction, to slide said carriage, sleeve, and gear bodily upon the driving shaft, to withdraw said gear from contact with the lastmentioned gear and a lever connected with said carriage, for swinging said driving shaft bodily in one direction or the other, to change the point of contact between the gears.

11. The combination of a driving shaft and a driven shaft; a sleeve slidably mounted upon the driving shaft and rotatable therewith; an annular flange formed upon said sleeveadjacent one end thereof; a friction disk provided with an annular bushing fastened directly to said flange; a non-rotatable carriage mounted upon said sleeve; antifriction bearings disposed between one end of said carriage and said flange; a friction gear secured to the driven shaft and adapted. for contact with the first-mentioned gear; and a swinging ineinber engaged with the carriage, for sliding the same and the sleeve upon the driving shaft in one direction or the other, to engage and disengage said gears.

In testimony whereof, I aflix my signa ture, in presence of two Witnesses.

CHARLES C. KEYSER. Witnesses H. C. MCCARTENEY, GEO. H. CHANDLEE. 

